26166157420 has 48 divisors (see below), whose sum is σ = 62290297440. Its totient is φ = 9152856576.

The previous prime is 26166157417. The next prime is 26166157429. The reversal of 26166157420 is 2475166162.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26166157429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2643457 + ... + 2653336.

It is an arithmetic number, because the mean of its divisors is an integer number (1297714530).

Almost surely, 2^26166157420 is an apocalyptic number.

26166157420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26166157420 is an abundant number, since it is smaller than the sum of its proper divisors (36124140020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26166157420 is a wasteful number, since it uses less digits than its factorization.

26166157420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296834 (or 5296832 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 26166157420 in words is "twenty-six billion, one hundred sixty-six million, one hundred fifty-seven thousand, four hundred twenty".